Mickey: [SOLVED] General "stuttering" not GPU related

Hey there. I underlined the most relevant information, so that you can skip small talk if you will.

I was playing Far Cry 4 the other day with my just-acquired Radeon HD 7990 (hell of a card, performing generally better than the youngest AMD multi-gpus, BF4 crossfire profile is great for FC4 by the way) and after an hour through the game heavy stuttering happened to appear, only going away upon reboot.

I minimized the game and realized the mouse pointer "stuttered" when moving. If I...